1. Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, Minnesota, USA
2. Department of Community and Behavioral Health, University of Iowa College of Public Health, Iowa City, Iowa, USA
3. University of Iowa Public Policy Center, Iowa City, Iowa, USA
4. Department of Occupational and Environmental Health, University of Iowa College of Public Health, Iowa City, Iowa, USA
5. Department of Economics, Tippie College of Business, University of Iowa, Iowa City, Iowa, USA